dsp.fft system object unbounded in a for loop

Question

Joshua Ford 2022-2-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1655000-dsp-fft-system-object-unbounded-in-a-for-loop

回答： Kiran Kintali 2022-9-7

I have matrix if size 256x1024, I would like to do the fft across each row and put it back into the matrix. Previously this has worked for the basic fft function, but I want to use the dsp.fft system object for a fixed-point fft. When using this method an error appears stating the system object does not support unbounded objects. However I have specified the size of the target matrix and have used methods such as assert and code.varargin.

Any help would be great. I have included my code below

%Normal fft method that works 
NoPulses = 256
for i = 1:NoPulses
fftRSignal(i,:) = fft(RSignal(i,:))
end
%dsp.fft system object method that doesn't work 
coder.varsize('RSignal',[256 1024]);
NoPulses = 256
fftRSignal = complex(zeros(NoPulses, length(RSignal)))
ft = dsp.FFT
for i = 1:NoPulses
    assert(i <= NoPulses)
fftRSignal(i,:) = ft(RSignal(i,:))
end